Push-Pull Operation:

While physically maintaining both electromagnet and cap on same
axis, the cap pulls (attracts) the electromagnet when DC power is
off. The electromagnet pushes (repels) the cap when DC power is on.
Most of time or default position is that the electromagnet holds the
cap in a gap. When DC power is momentarily on, the electromagnet
exerts a repulsive force on the cap. Momentary power-on should not
be more than two (2) times per minute.

DC power connection:

There are two flexible lead wires. Red connects to positive of 12
Volt DC terminal and black to negative.

DC power source concern:

Usually a push-pull electromagnet instantly takes a large amount of
DC current to repel or push a cap, it is recommended to use an
unregulated DC power supply that can provide a pulsed inrush
current. In case of weak or no pushing force, it is most likely due
to using a regulated DC power supply that has current limit. It can
be easily verified by using an automotive battery as DC power
source.

We are developing a controlled tank circuit that stores energy
before applying to a push-pull electromagnet, so that DC power
source would not need to instantly deliver high inrush current.

Safety Caution:

The holding values as listed are actual readings
of breaking away a 1/2" steel plate with no air-gaps between them.
They have not been de-rated. For safety in holding applications, do
not use electromagnets at more than 1/2 of rated value. In lifting
applications, do not use at more than 1/4 of rated value. Do not use
electromagnets over people.